For which purpose is “God permitted trade and prohibited ribā” especially naṣṣ?

Degrees of Indication: Ẓāhir, Naṣṣ, Mufassar, Muḥkam and Obscure Expressions

• Rejecting the claim that sale and ribā have the same legal status
• Giving only a dictionary definition of trade
• Enumerating all elements of every contract
• Fixing the price of a specific sale